Harry felt Ginny put her head oh his shoulder and he smiled, then he heard he laugh with abandon and the beast in his chest roared to life in triumph.
He was making her happy, he had shown her a day where she could just be Ginny. The emotion was so foreign to him that even the potion could not touch it. He felt quite invincible at the moment.
Instead he just sat back and enjoyed it, absently opening the Snow Caps and offering them to her.